Method of directly softening rolled machine structural steels
    1.
    发明授权
    Method of directly softening rolled machine structural steels 失效
    直接软化轧制机结构钢的方法

    公开(公告)号:US4753691A

    公开(公告)日:1988-06-28

    申请号:US18575

    申请日:1987-02-25

    CPC分类号: C21D1/32 C21D8/00 C22C38/32

    摘要: A method of directly softening a rolled machine structural steel is provided. This method is characterized by the fact that it comprises the steps of:hot rolling a steel consisting essentially of 0.2-0.65% C, less than 0.1% Si, 0.2-0.5% Mn, 0.0003-0.01% B, more than 0.5-1.7% Cr, 0.01-0.1% Al, all of the percentages being on a weight basis, and the balance being Fe and incidental impurities, and may contain one or more other alloying elements selected from either one of or both of groups (A) and (B), group (A) consisting of not more than 1% Ni, 0.1-0.5% Mo and not more than 1% Cu, and the other group (B) consisting of 0.002-0.05% Ti, 0.005-0.05% Nb and 0.005-0.2% V,then subjecting said rolled steel to either one of the two softening treatments (1) or (2), the treatment (1) comprises slowly cooling the steel in a temperature range until transformation to pearlite is completed at a cooling rate of less than 15.degree. C./min, and the treatment (2) comprises, isothermally holding said steel in a temperature range of 680.degree. to 730.degree. C. until the transformation to pearlite is completed and then to natural cooling, so that the steel can display a tensile strength less than a value expressed by a formula,24+67.times.Ceq (kg/mm.sup.2), specified by the carbon equivalent Ceq (kg/mm.sup.2) of the subject steel.

    摘要翻译: 提供了一种直接软化轧制机械结构钢的方法。 该方法的特征在于它包括以下步骤:将基本上由0.2-0.65%C,小于0.1%Si,0.2-0.5%Mn,0.0003-0.01%B,大于0.5-1.7%的钢热轧 %Cr,0.01-0.1%Al,所有百分比均以重量为基准,余量为Fe和附带杂质,并且可含有一种或多种其它选自基团(A)和 (B),由不超过1%Ni,0.1-0.5%Mo和不超过1%Cu组成的组(A),另一组(B)由0.002-0.05%Ti,0.005-0.05%Nb 和0.005-0.2%V,然后对所述轧制钢进行两个软化处理(1)或(2)中的任一个,处理(1)包括在一定温度范围内缓慢冷却钢,直至在珠光体转变为 冷却速度小于15℃/ min,处理(2)包括在680〜730℃的温度范围内等温保持钢,直到转变为pe 然后进行自然冷却,使得钢可以显示低于由公式表示的值的拉伸强度,24 + 67xCeq(kg / mm2),由对象的碳当量Ceq(kg / mm2)指定 钢。

    Method for softening rolled medium carbon machine structural steels
    2.
    发明授权
    Method for softening rolled medium carbon machine structural steels 失效
    软化轧制中碳机械结构钢的方法

    公开(公告)号:US4702778A

    公开(公告)日:1987-10-27

    申请号:US821550

    申请日:1986-01-22

    CPC分类号: C21D8/00 C21D1/32 C22C38/18

    摘要: A method of softening a rolled medium carbon machine structural steel is provided. This method is characterized by:(1) hot rolling steel containing 0.32-0.65% C, less than 0.05% Si, 0.3-0.9% in total of Mn and Cr, with the Mn and Cr contents being 0.2-0.5% and 0.1-0.5%, respectively, 0.005-0.1% Al, less than 0.02% P and less than 0.02% S, all percents being on a weight basis, and the balance being Fe and incidental impurities; and(2) performing either one of the following softening treatments:(i) slowly cooling the as-rolled steel at a cooling rate of 3.degree.-30.degree. C./min over the temperature range of from 750.degree. C. to the point where transformation to pearlite is completed to thereby provide the rolled steel with a strength of not greater than 30+65.times.C % (kg/mm.sup.2), C % signifying the carbon content of the steel; oras-rolled quenching the hot rolled steel to a temperature within the range of 670.degree.-720.degree. C., holding the steel in this temperature range for 4-60 minutes, and then air-cooling the steel to thereby provide the rolled steel with a strength of not greater than 30+65.times.C % (kg/mm.sup.2), C % signifying the carbon content of the steel.

    摘要翻译: 提供了一种软化轧制中碳机结构钢的方法。 该方法的特征在于:(1)含有0.32-0.65%C,小于0.05%Si,0.3-0.9%的Mn和Cr的热轧钢,Mn和Cr含量为0.2-0.5%,0.1- 0.5%,分别为0.005-0.1%Al,小于0.02%P和小于0.02%S,所有百分比均为重量,余量为Fe和附带杂质; 和(2)进行以下软化处理之一:(i)在750℃的温度范围内以3℃-30℃/分钟的冷却速度将该冷轧钢缓慢冷却至点 其中完成对珠光体的转化,由此提供不大于30 + 65×C%(kg / mm 2)的强度的轧制钢,C%表示钢的碳含量; 或者将该热轧钢的冷轧淬火至670〜-720℃的温度范围,将钢在该温度范围内保持4-60分钟,然后对钢进行空冷,由此提供轧制钢 强度不大于30 + 65×C%(kg / mm2),C%表示钢的碳含量。

    High strength, ultra fine steel wire having excellent workability in
stranding and process and apparatus for producing the same
    3.
    发明授权
    High strength, ultra fine steel wire having excellent workability in stranding and process and apparatus for producing the same 失效
    高强度,超薄的钢丝,具有良好的拉伸和加工工艺性能,以及用于生产它的装置

    公开(公告)号:US5240520A

    公开(公告)日:1993-08-31

    申请号:US910019

    申请日:1992-07-16

    IPC分类号: C21D7/06 C21D8/06 C22C38/18

    摘要: A high-strength, ultra-fine wire having an excellent workability in stranding, comprising a steel comprised of, in terms of % by weight, 0.85 to 1.10% of C, 0.10 to 0.70% of Si, 0.20 to 0.60% of Mn, 0.10 to 0.60% of Cr, 0.005% or less of Al and optionally at least one member selected from 0.10 to 2.00% of Ni and 0.10 to 3.00% of Co with the balance Fe and unavoidable impurities and, provided thereon, a brass plating, the steel wire having a diameter of 0.1 to 0.4 mm and a tensile strength of 400 kgf/mm.sup.2 or more, the surface of the brass plating being provided with indentations having a depth of 2 .mu.m or less at intervals of 50 .mu.m or less in a percentage area of indentations of 10 to 80%; and a process and apparatus for producing a high strength, ultra fine steel wire, comprising subjecting a steel wire material to a patenting treatment, brass plating and wire drawing and subjecting the steel wire material to a shot peening treatment in an air blast system while applying a tension to the steel wire material.

    摘要翻译: PCT No.PCT / JP91 / 01582 Sec。 371日期:1992年7月16日 102(e)日期1992年7月16日PCT 1991年11月19日PCT PCT。 出版物WO92 / 08817 日期:1992年5月29日。一种绞合加工性优异的高强度超细线,其特征在于,以重量%计,C:0.85〜1.10%,Si:0.10〜0.70%,0.20 至0.60%的Mn,0.10〜0.60%的Cr,0.005%以下的Al和任选的至少一种选自0.10〜2.00%的Ni和0.10〜3.00%的Co,余量为Fe和不可避免的杂质, 其上镀黄铜,直径为0.1〜0.4mm,拉伸强度为400kgf / mm2以上的钢丝,黄铜镀层的表面间隔设置有深度为2μm以下的凹痕 在50%以下的压痕百分比为10〜80%的压痕。 以及用于生产高强度超细钢丝的方法和装置,包括对钢丝材料进行专利处理,黄铜镀层和拉丝并且在施加吹风系统的同时对钢丝材料进行喷丸处理 对钢丝材料的张力。

    High-strength steel material with excellent hydrogen embrittlement resistance
    4.
    发明授权
    High-strength steel material with excellent hydrogen embrittlement resistance 有权
    高强度钢材具有优异的耐氢脆性

    公开(公告)号:US08557060B2

    公开(公告)日:2013-10-15

    申请号:US13183710

    申请日:2011-07-15

    IPC分类号: C22C38/12

    摘要: The invention provides a steel material with satisfactory hydrogen embrittlement resistance, and particularly it relates to high-strength steel with satisfactory hydrogen embrittlement resistance and a strength of 1200 MPa or greater, as well as a process for production thereof. At least one simple or compound deposit of oxides, carbides or nitrides as hydrogen trap sites which trap hydrogen with a specific trap energy is added to steel, where the mean sizes, number densities, and length-to-thickness ratios (aspect ratio) are in specific ranges. By applying the specific steel components and production process it is possible to obtain high-strength steel with excellent hydrogen embrittlement resistance.

    摘要翻译: 本发明提供具有令人满意的耐氢脆性的钢材,特别涉及具有良好的耐氢脆性和1200MPa以上的强度的高强度钢及其制造方法。 将至少一种简单或复合的氧化物,碳化物或氮化物沉积物作为捕集具有特定阱能量的氢的氢捕集点添加到钢中,其中平均尺寸,数量密度和长度与厚度比(纵横比) 在特定范围内。 通过应用特定的钢部件和制造方法,可以获得耐氢脆性优异的高强度钢。

    High -Strength Steel Material With Excellent Hydrogen Embrittlement Resistance
    6.
    发明申请
    High -Strength Steel Material With Excellent Hydrogen Embrittlement Resistance 有权
    高强度钢材料具有优异的耐氢脆性

    公开(公告)号:US20060144474A1

    公开(公告)日:2006-07-06

    申请号:US10546330

    申请日:2004-01-20

    IPC分类号: C22C38/12

    摘要: The invention provides a steel material with satisfactory hydrogen embrittlement resistance, and particularly it relates to high-strength steel with satisfactory hydrogen embrittlement resistance and a strength of 1200 MPa or greater, as well as a process for production thereof. At least one simple or compound deposit of oxides, carbides or nitrides as hydrogen trap sites which trap hydrogen with a specific trap energy is added to steel, where the mean sizes, number densities, and length-to-thickness ratios (aspect ratio) are in specific ranges. By applying the specific steel components and production process it is possible to obtain high-strength steel with excellent hydrogen embrittlement resistance.

    摘要翻译: 本发明提供具有令人满意的耐氢脆性的钢材,特别涉及具有良好的耐氢脆性和1200MPa以上的强度的高强度钢及其制造方法。 将至少一种简单或复合的氧化物,碳化物或氮化物沉积物作为捕集具有特定阱能量的氢的氢捕集点添加到钢中,其中平均尺寸,数量密度和长度与厚度比(纵横比) 在特定范围内。 通过应用特定的钢部件和制造方法,可以获得耐氢脆性优异的高强度钢。

    High-strength steel material with excellent hydrogen embrittlement resistance
    8.
    发明授权
    High-strength steel material with excellent hydrogen embrittlement resistance 有权
    高强度钢材具有优异的耐氢脆性

    公开(公告)号:US08016953B2

    公开(公告)日:2011-09-13

    申请号:US10546330

    申请日:2004-01-20

    IPC分类号: C22C38/12

    摘要: The invention provides a steel material with satisfactory hydrogen embrittlement resistance, and particularly it relates to high-strength steel with satisfactory hydrogen embrittlement resistance and a strength of 1200 MPa or greater, as well as a process for production thereof. At least one simple or compound deposit of oxides, carbides or nitrides as hydrogen trap sites which trap hydrogen with a specific trap energy is added to steel, where the mean sizes, number densities, and length-to-thickness ratios (aspect ratio) are in specific ranges. By applying the specific steel components and production process it is possible to obtain high-strength steel with excellent hydrogen embrittlement resistance.

    摘要翻译: 本发明提供具有令人满意的耐氢脆性的钢材,特别涉及具有良好的耐氢脆性和1200MPa以上的强度的高强度钢及其制造方法。 将至少一种简单或复合的氧化物,碳化物或氮化物沉积物作为捕集具有特定阱能量的氢的氢捕集点添加到钢中,其中平均尺寸,数量密度和长度与厚度比(纵横比) 在特定范围内。 通过应用特定的钢部件和制造方法,可以获得耐氢脆性优异的高强度钢。

    High strength bolt excellent in delayed fracture resistance and method of production of same
    9.
    发明授权
    High strength bolt excellent in delayed fracture resistance and method of production of same 有权
    耐久性优异的高强度螺栓及其制造方法

    公开(公告)号:US07510614B2

    公开(公告)日:2009-03-31

    申请号:US11490975

    申请日:2006-07-21

    摘要: The present invention provides a high strength bolt excellent in delayed fracture resistance able to advantageously prevent hydrogen embrittlement as represented by the delayed fracture phenomenon occurring along with an increase in strength and causing a particular problem, and a method of production of the same, containing, by mass %, C: 0.2 to 0.6%, Si: 0.05 to 0.5%, Mn: 0.1 to 2%, Mo: 0.5 to 6%, and Al: 0.005 to 0.5%, having a tensile strength of 1400 MPa or more, and having a compressive residual stress of the surface layer of the thread root of 10 to 90% of the tensile strength. Further, a surface layer part of the thread root from the surface down to at least 50 μm has pre-austenite grains with an aspect ratio of the axial direction and radial direction of 2 or more and that part has a hardness of Hv 460 or more. Further, the method of production comprises using the steel material having the above ingredients to shape the bolt head and shaft, then heat the bolt to 900 to 1100° C., quench it, temper it by a 580° C. or higher temperature, then thread roll it.

    摘要翻译: 本发明提供了一种具有优异的延迟断裂抵抗性的高强度螺栓,其能够有利地防止随着强度的增加而发生的延迟断裂现象所引起的氢脆化,并引起特定问题,及其制造方法, 以下,拉伸强度为1400MPa以上,C:0.2〜0.6%,Si:0.05〜0.5%,Mn:0.1〜2%,Mo:0.5〜6%,Al:0.005〜 并且具有螺纹根表面层的抗拉强度的10〜90%的压缩残余应力。 此外,从表面向下至至少50μm的螺纹根部的表面层部分具有轴向和径向的纵横比为2以上的预奥氏体晶粒,并且该部分的硬度为Hv 460以上 。 此外,生产方法包括使用具有上述成分的钢材来成形螺栓头和轴,然后将螺栓加热至900至1100℃,淬火,回火580℃或更高的温度, 然后卷起它。

    High strength bolt excellent in delayed fracture resistance and method of production of same
    10.
    发明申请
    High strength bolt excellent in delayed fracture resistance and method of production of same 有权
    耐久性优异的高强度螺栓及其制造方法

    公开(公告)号:US20070017610A1

    公开(公告)日:2007-01-25

    申请号:US11490975

    申请日:2006-07-21

    IPC分类号: C22C38/12

    摘要: The present invention provides a high strength bolt excellent in delayed fracture resistance able to advantageously prevent hydrogen embrittlement as represented by the delayed fracture phenomenon occurring along with an increase in strength and causing a particular problem, and a method of production of the same, containing, by mass %, C: 0.2 to 0.6%, Si: 0.05 to 0.5%, Mn: 0.1 to 2%, Mo: 0.5 to 6%, and Al: 0.005 to 0.5%, having a tensile strength of 1400 MPa or more, and having a compressive residual stress of the surface layer of the thread root of 10 to 90% of the tensile strength. Further, a surface layer part of the thread root from the surface down to at least 50 μm has pre-austenite grains with an aspect ratio of the axial direction and radial direction of 2 or more and that part has a hardness of Hv 460 or more. Further, the method of production comprises using the steel material having the above ingredients to shape the bolt head and shaft, then heat the bolt to 900 to 1100° C., quench it, temper it by a 580° C. or higher temperature, then thread roll it.

    摘要翻译: 本发明提供了一种具有优异的延迟断裂性的高强度螺栓,其能够有利地防止随着强度的增加而发生的延迟断裂现象所引起的氢脆化,并引起特定问题,及其制备方法, 以下,拉伸强度为1400MPa以上,C:0.2〜0.6%,Si:0.05〜0.5%,Mn:0.1〜2%,Mo:0.5〜6%,Al:0.005〜 并且具有螺纹根表面层的抗拉强度的10〜90%的压缩残余应力。 此外,从表面向下至至少50μm的螺纹根部的表面层部分具有轴向和径向的纵横比为2以上的预奥氏体晶粒,并且该部分的硬度为Hv 460以上 。 此外,生产方法包括使用具有上述成分的钢材来成形螺栓头和轴,然后将螺栓加热至900至1100℃,淬火,回火580℃或更高的温度, 然后卷起它。